Feed-water purifier and heater



(No Model.) 2 Sheets-Sheet 1.

J. BONAR & W. L. RODGBRS. EEED WATER EUEIEEEE AND HEATER.

(No Model.) 2 sheets-sheet 2. J. BONAR & W. L. RODGERS.

vFEED WATER PURIPIBR ANDHEATER. 4 No. 558,147. f

Patented Apr. 14, 1896.

Afro/mfr.

W/TNESSES:

ANDREW RGRHAVL PHOT0 LITNDJNASHIN6TON UNITED `STATES PATENT OEEICE.

JAMES BONAR, OF PITTSBURG, AND IVILLIAM L. RODGERS, OF ALLEGHENY,

PENNSYLVANIA.

FEED-WATER PURIFIER AND HEATER.

SPECIFICATION forming part of Letters Patent No. 558,147, dated April 14, 1896. Application filed June 2'7, 1895. Serial No. 554,173, (No model.)

To a/ZZ whom t Hwy/'concern- Be it known that we, JAMES BONAR, residing at Pittsburg, and WILLIAM L. RoDeEEs, residing at Allegheny, Allegheny county,

State of Pennsylvania, citizens of the United water purifier and heater for steam-generators 3 and it consists of a device arranged upon the top of the boiler or generator and in communication therewith, having arranged therein a series of removable pans attached in a horizontal position to a central shaft, a sediment-chamber at the base below the said pans, a skimming-ring arranged about a central settling and heating chamber, a water-inlet at the top, and a steam and water outlet at the bottom, together with the certain details of construction and combination of parts, as will be fully described hereinafter.

The object of our invention is to provide a simple, inexpensive, and durable device for purifying the water before entering a boiler by removing all sediment and foreign substance contained therein and at the same time bring the water to a temperature equal to that of the live steam.

In the accompanying drawings, Figure 1 is a central sectional elevation of our improved feed-water purifier and heater, showing the same connected to the top of a boiler, the said purifier and heater being constructed and arranged in accordance with our invention. Fig. 2 is a sectional plan view of the same, taken on the line X X of Fig. 1. Fig. 3 is a sectional plan view of the combined purifier and heater, said section taken on the line Y Y of Fig. 1.

To put our invention into practice, we provide a cylindrical shell1, of a suitable diameter, and provide the same with a dish-plate 2, securely riveted about the lower periphery of the said shell 1. This base 2 is formed with an orifice at the center, which is connected by a passage 4 to the interior of the boiler 5 by means of a suitable Han ged casting 3, attached to the said base 2 and the top of the boiler by rivets, which also serve as a means of supporting and connecting the device in position. Arranged over this passage 4 to the boiler is a chamber 7, formed from metal, having an annular open base and attached to a flanged ring 6 by means of bolts 8 in a manner that the same may be removed, if so desired. This chamber 7 is formed with a closed top having a central opening 10 provided with a slightly-elevated flange 7 about its periphery to keep a slight depth of water at all times over the top of the chamber 7, in order that' it may increase the temperature of the same before finally passing into the boiler 5.

Surrounding the heating-chamber 7 is an annular ring 11, the top periphery of which is slightly above the top of the flanged opening 7 and the lower edge extending some distance below into the water collected in the bottom of the device. This ring 11 acts as a skimmer to prevent any light foreign substance in the water from passing into the opening 7. Y

Arranged at the top of the shell 1 is a circular plate 13, which is supported in a groove formed in the top iianges of the casing or shell 1 and serves as a means of supporting and centering a series of circular sedimentpans 15, connected thereto. These sedimentpans 15 are formed from circular plates of metal, having a iange 16 of varying depth, ranging from the full height at one point and gradually diminishing in depth until iush with the surface of the plate at apoint opposite. Formed at one side of the center of these sediment-pans 15 are iianged openings 17, said iiange projecting some distance above the surface to separate the one pan from the other when in position. These pans 15 are attached tothe plate 13 by means of a shaft 14 passing through the 4fianged openings 17 and through a slightly-dished circular recep tacle 19 at the bottom, and the whole heldin position by a nut 20. The arrangement of these sediment-pans 15 is such as shown at Figs. 1 and 2 on the drawings, the one above IOO the other, with alternate long and short sides in a manner that the water from the one will fall to the other and lengthens the time of the passage of the same to the boilers 5.

Attached to the top of the rod 14 is a basin 22 to receive the end of the water-inlet pipe 24 and form a seal to prevent the live steam from the boiler 5 passing into said pipe. The plate 13, suspending the pan 15, is provided at one side with perforations 21, through which the water passes to the first of the series of pans 15 below.

Communicating with the sediment-chamber 9 at -the base of the apparatus is a blowoff pipe 26, which, together with the feed-pipe 24 at the top, is fitted with suitable valves or cocks (not shown on the drawings) to properly operate the device.

In operation the water from the injector or pump is forced into the 'apparatus through the feed-pipe 24 into the basin or seal 22, and overflowing from this to the plate 13, which is heated by the live steam from the boiler 5, will deposit a portion of the sediment on the top of the same and then pass through the openings 21 to the first pan 15 below. While passing over this first pan 15, the water will be distributed over the entire surface in a thin sheet, gradually gathering heat from the said pan and depositing a portion of its impurities upon the same. From this first or top pan the water drops to the pan below and flows in a reverse direction and is discharged to the third pan below. This zigzag course of the water is continued over the entire series of the pans 15 in a thin sheet, giving the same an opportunity to deposit its impurities upon the said pans and at the same v time gathering heat both from the live steam which fills the chamber and from the high temperature of the pans. From the last or lower pan 15 of the series the water is dis charged into the circular settling-pan 19 and separates into small diffused streams `about the entire periphery of the said pan 19 and falls to the settling-chamber 9 below outside of the skimming-ring 11. The water is now almost purified and brought to a high tempera ture, as in passing over the pans 15 the sediment will be deposited with the exceptions of such light foreign matter usually found floating upon the top. This light foreign matter will be prevented from entering the boiler 5 by the skimming-ring 11, as the purified water, in order to reach the opening 10 of the heatingchamber 7, must necessarily pass beneath the lower periphery of said ring and then ascend upward between the exterior wall 7 of the heating-chamber 2O and the interior wall of the skimming-ring. The water, now free from all foreign substance, passes in a thin sheet over the top of the heating-chamber 20, where the same gathers a high temperature from contact with the exterior walls of said chamber equal to the live steam in the boiler.

The space between the walls of the heatingchamber 2O and that of the shell 1 forms a settling-chamber 9, where the water may be kept comparatively quiet, for the reason that the area and volume of the top surface of the water is much less than that about the lower edge of the skimming-ring 11, giving the water an opportunity to settle and the sediment to gather in the bottom of the settling-chamber. This high temperature of the water is dueto the live steam kept constantly circulating in the interior of the apparatus, said steam entering through the same opening as that at 4,through which the water enters the boiler 5. This steam is constantly being replenished,for the reason of the condensation of the same at the top of the apparatus and mingling with the cold water entering through the feed-pipe 24.

To clean the sediment-chamber 9 at the bot'- tom of the apparatus, it is only necessary to open the valve (not shown) of the blow-off pipe 26 and permit the pressure of steam and water to freely circulate through the several compartments.

The pans 15 may be partially cleaned by opening the blow-off; but in order to thoroughly clean the scale and other sediment from said pans it is necessary to release the bolts 25 and remove the top or cover 23 and lift the entire series of pans 15, together with the top plate 13 and settling plate or pan 19 at the base. After removing this part of the apparatus the same may be easily scraped or otherwise cleaned.

The top plate 13, while acting as a settlingpan, serves as a means of centering and sustaining the pans 15.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a feed-water purifier and heater such as described, the removable sediment-pans arranged one above the other in a manner that the water from one falls to the next below, and a heating-chamber having a flange formed above the opening, whereby a thin sheet of water is kept upon the top of the heating-chamber, for the purpose described.

2. In combination, a purifier and heater, a basin 22 adapted to prevent the steam from entering the feed-water pipe and form a seal, a series of removable sediment-pans, a diffusing-pan arranged below the sediment-pans and a heater having a flange whereby a thin sheet of water isretained thereon, as and for the purpose described.

3. In combination with the heating-chamber 7, the flange 7 formed about the opening 10, whereby a thin sheet of water may be kept upon the top of said chamber, as and for the purpose described.

In testimony whereof we afx our signatures in presence of two witnesses.

JAMES BONAR. WILLIAM L. RODGERS. Witnesses JAMES CAMPBELL, ELLIOTT RoDGERs.

IOC

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